Perimenopause Isn't "All in Your Head": A San Francisco Doctor's Guide to What's Actually Happening
By Dr. Smriti Singh, DO, MPH · Updated October 2026
You’re not sleeping the way you used to. You wake up at 3 a.m. hot and wired. Your period shows up early, late, or heavier than it ever has. You walk into a room and forget why. Your workouts don’t seem to do what they used to, and you’re more irritable than you recognize in yourself.
When you bring it up, the answer is some version of “it’s stress” or “you’re getting older.” Maybe you even had labs drawn, and they came back “normal.”
What you’re describing may be perimenopause. It deserves a real explanation, not a shrug.
What is perimenopause?
Perimenopause is the transition leading up to menopause. During it, your ovaries’ hormone production becomes uneven. Estrogen and progesterone don’t decline in a smooth line. They rise and fall unpredictably, sometimes month to month and sometimes week to week. That’s why symptoms can come and go, and why one month can feel completely different from the next.
Menopause itself is one specific point in time: 12 months in a row without a period. In the U.S., that happens at about age 51 on average. Perimenopause is everything leading up to it.
When does perimenopause start, and how long does it last?
Most women notice changes in their 40s, and some start in their mid-to-late 30s. The transition lasts about four years on average, but for some women it lasts eight to ten. Many women don’t connect their symptoms to perimenopause because they think they’re “too young” for it.
Common perimenopause symptoms
Every woman’s experience is different, but these are the ones we hear about most:
Changes in your cycle: periods that are closer together, further apart, heavier, lighter, or skipped
Hot flashes and night sweats
Sleep problems, especially waking in the middle of the night
Mood changes: irritability, anxiety, or low mood that feels out of character
Brain fog: trouble finding words, focusing, or remembering things
Weight shifting toward the midsection, even with the same diet and exercise
Joint and muscle aches, and slower recovery from workouts
Vaginal dryness or discomfort, and lower libido
Fatigue that doesn’t match how much you’re sleeping
If several of these sound familiar, you’re not imagining it.
Can a blood test diagnose perimenopause?
Often, no, and this is one of the most misunderstood parts of perimenopause.
Hormone levels swing so much during this transition that a single blood draw is just a snapshot of one day. You can have very real symptoms and still get a “normal” estrogen or FSH result. Perimenopause is usually diagnosed by looking at the whole pattern: your age, your symptoms and how your cycle is changing.
Labs still matter, just for a different reason. Thyroid problems, anemia, low iron and vitamin deficiencies can cause many of the same symptoms (fatigue, mood changes, poor sleep, heavy periods). Testing for these makes sure we’re not missing something else.
What treatment options exist?
Treatment depends on your symptoms, your health history and what you want. Options generally fall into a few categories:
Lifestyle foundations: strength training, enough protein, a sleep routine that fits how your body works now, and an honest look at alcohol, which often makes hot flashes and sleep worse during this stage.
Hormone therapy: for many healthy women, replacing estrogen (with progesterone if you still have a uterus) is the most effective treatment for hot flashes, night sweats and sleep problems. Whether it’s right for you depends on your personal and family history, which is what a consultation is for. Learn more about hormone therapy for women
Non-hormonal options: for women who can’t or don’t want to use hormones, there are medications and other approaches that can help specific symptoms.
Local treatment for vaginal dryness and discomfort, which is often overlooked and very treatable.
When to see a doctor sooner rather than later
Some changes need a prompt evaluation and shouldn’t be written off as perimenopause:
Bleeding heavy enough to soak through a pad or tampon every hour or two
Periods that last much longer than usual, or bleeding between periods
Bleeding after sex
Any bleeding after you’ve gone 12 months without a period
Feeling dizzy, short of breath or exhausted, which can be signs of anemia from heavy bleeding
As an emergency physician, I’ve seen what happens when symptoms like these get dismissed for too long. If something feels wrong, get it checked.
How perimenopause care works at Trailhead
We start with a real conversation, not a ten-minute visit. You’ll talk directly with me about your symptoms, cycle history, sleep, training and goals. From there, we decide which labs make sense to rule out other causes, and we build a plan together. That plan might be lifestyle changes alone, hormone therapy, non-hormonal options or a mix. You’re not passed between providers, and you’ll understand the reasoning behind every recommendation.
We see patients in person in San Francisco and by telehealth throughout California.
Frequently asked questions
How do I know if what I’m experiencing is perimenopause?
No single symptom confirms it. It’s a pattern, usually changes in your cycle along with symptoms like hot flashes, sleep problems or mood shifts, typically starting in your 40s. An evaluation helps confirm it and rule out other causes.
I’m only 38. Could this be perimenopause?
It can be. Some women begin noticing changes in their late 30s. It’s also worth checking for other causes, like thyroid problems or low iron.
My labs were normal. Does that mean it’s not hormonal?
Not necessarily. Hormones fluctuate so much during perimenopause that a single test often looks normal. Diagnosis is based on the overall pattern, not one number.
Is hormone therapy safe?
For many healthy women who start within about ten years of menopause, the benefits outweigh the risks. It isn’t right for everyone, though. A personal or family history of certain cancers, blood clots or other conditions can change the recommendation, which is why we go through your history in detail first.
Does insurance cover this?
Trailhead Wellness is a cash-pay practice. We’ll go over what your evaluation and any recommended treatment would cost during your consultation, before you commit to anything.
You don’t have to push through this
If something has felt off and you haven’t been able to get a straight answer, come talk with us. We’ll listen, take it seriously and help you understand what’s going on.
Book a consultation with Trailhead Wellness Medicine
This article is for general educational purposes and is not a substitute for professional medical advice, diagnosis or treatment. Please consult a qualified physician about your own health history and options.
